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/openbmc/linux/arch/ia64/include/asm/
H A Dtlb.hdiff 6c57a332901f851bd092aba7a2b4d8ef4e643829 Thu Jan 07 18:10:57 CST 2010 Tony Luck <tony.luck@intel.com> [IA64] __per_cpu_idtrs[] is a memory hog

__per_cpu_idtrs is statically allocated ... on CONFIG_NR_CPUS=4096
systems it hogs 16MB of memory. This is way too much for a quite
probably unused facility (only KVM uses dynamic TR registers).

Change to an array of pointers, and allocate entries as needed on
a per cpu basis. Change the name too as the __per_cpu_ prefix is
confusing (this isn't a classic <linux/percpu.h> type object).

Signed-off-by: Tony Luck <tony.luck@intel.com>
/openbmc/linux/arch/ia64/mm/
H A Dtlb.cdiff 6c57a332901f851bd092aba7a2b4d8ef4e643829 Thu Jan 07 18:10:57 CST 2010 Tony Luck <tony.luck@intel.com> [IA64] __per_cpu_idtrs[] is a memory hog

__per_cpu_idtrs is statically allocated ... on CONFIG_NR_CPUS=4096
systems it hogs 16MB of memory. This is way too much for a quite
probably unused facility (only KVM uses dynamic TR registers).

Change to an array of pointers, and allocate entries as needed on
a per cpu basis. Change the name too as the __per_cpu_ prefix is
confusing (this isn't a classic <linux/percpu.h> type object).

Signed-off-by: Tony Luck <tony.luck@intel.com>
/openbmc/linux/arch/ia64/kernel/
H A Dmca.cdiff 6c57a332901f851bd092aba7a2b4d8ef4e643829 Thu Jan 07 18:10:57 CST 2010 Tony Luck <tony.luck@intel.com> [IA64] __per_cpu_idtrs[] is a memory hog

__per_cpu_idtrs is statically allocated ... on CONFIG_NR_CPUS=4096
systems it hogs 16MB of memory. This is way too much for a quite
probably unused facility (only KVM uses dynamic TR registers).

Change to an array of pointers, and allocate entries as needed on
a per cpu basis. Change the name too as the __per_cpu_ prefix is
confusing (this isn't a classic <linux/percpu.h> type object).

Signed-off-by: Tony Luck <tony.luck@intel.com>